The rate constant of the reaction A B is 0.6 x 10-3 mole per second. If the concentration of A is 5 M, then concentration of B after 20 minutes is:
1.08 M
3.60 M
0.36 M
0.72 M
As learnt in
nth order reaction -
The rates of the reaction is proportional to nth power of reactant
- wherein
Differential rate law
Integrated rate laws,
a= initial, concentration of reactant at t=0 sec
x= concentration of product formed at t= tsec
Reaction is of zero order as the unit of rate constant is mol L-1 s-1
concentration = K t
= 0.6 x 10-3 x 20 x 60 M
= 0.72 M
Option 1)
1.08 M
This answer is incorrect
Option 2)
3.60 M
This answer is incorrect
Option 3)
0.36 M
This answer is incorrect
Option 4)
0.72 M
This answer is correct